Q: Why would I want to use this plugin / widget?

To show your faith in WordPress code and the developers who write it.

Q: My custom styles are no working, what happened?

WordPress essentially removes the existing files and folders of a plugin and replaces them with the new updated package, including any custom stylesheet you may have added. This would remove you old customizations. To future proof these additions you can now use the /bns-customs/ folder (you may need to create this folder) under /wp-content/.